<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
</head>
<body>
<div id="xxx">

</div>
<script type="text/javascript">
    $(function () {

    });
</script>
</body>
</html>